| |
| `timescale 1 ns / 1 ps |
| |
| `include "crossbar.v" |
| `include "dummy_slave.v" |
| |
| `ifndef AW |
| `define AW 32 |
| `endif |
| `ifndef DW |
| `define DW 32 |
| `endif |
| `ifndef NM |
| `define NM 2 |
| `endif |
| |
| `ifndef NS |
| `define NS 4 |
| `endif |
| |
| `ifndef SLAVE_ADR |
| `define SLAVE_ADR { \ |
| {8'hB0, {24{1'b0}}},\ |
| {8'hA0, {24{1'b0}}},\ |
| {8'h90, {24{1'b0}}},\ |
| {8'h80, {24{1'b0}}}\ |
| }\ |
| `endif |
| |
| `ifndef ADR_MASK |
| `define ADR_MASK { \ |
| {8'hFF, {24{1'b0}}}, \ |
| {8'hFF, {24{1'b0}}}, \ |
| {8'hFF, {24{1'b0}}}, \ |
| {8'hFF, {24{1'b0}}} \ |
| }\ |
| `endif |
| |
| module crossbar_wb_tb; |
| |
| localparam SEL = `DW / 8; |
| |
| reg wb_clk_i; |
| reg wb_rst_i; |
| |
| // Masters interface |
| reg [`NM-1:0] wbm_cyc_i; |
| reg [`NM-1:0] wbm_stb_i; |
| reg [`NM-1:0] wbm_we_i; |
| reg [(`NM*(`DW/8))-1:0] wbm_sel_i; |
| reg [(`NM*`AW)-1:0] wbm_adr_i; |
| reg [(`NM*`DW)-1:0] wbm_dat_i; |
| wire [`NM-1:0] wbm_ack_o; |
| wire [`NM-1:0] wbm_err_o; |
| wire [(`NM*`DW)-1:0] wbm_dat_o; |
| |
| // Slaves interfaces |
| wire [`NS-1:0] wbs_ack_o; |
| wire [(`NS*`DW)-1:0] wbs_dat_i; |
| wire [`NS-1:0] wbs_cyc_o; |
| wire [`NS-1:0] wbs_stb_o; |
| wire [`NS-1:0] wbs_we_o; |
| wire [(`NS*(`DW/8))-1:0] wbs_sel_o; |
| wire [(`NS*`AW)-1:0] wbs_adr_o; |
| wire [(`NS*`DW)-1:0] wbs_dat_o; |
| |
| wb_xbar #( |
| .NM(`NM), |
| .NS(`NS), |
| .AW(`AW), |
| .DW(`DW), |
| .SLAVE_ADR(`SLAVE_ADR), |
| .ADR_MASK(`ADR_MASK) |
| ) |
| wb_xbar( |
| .wb_clk_i(wb_clk_i), |
| .wb_rst_i(wb_rst_i), |
| // Masters interface |
| .wbm_cyc_i(wbm_cyc_i), |
| .wbm_stb_i(wbm_stb_i), |
| .wbm_we_i (wbm_we_i), |
| .wbm_sel_i(wbm_sel_i), |
| .wbm_adr_i(wbm_adr_i), |
| .wbm_dat_i(wbm_dat_i), |
| .wbm_ack_o(wbm_ack_o), |
| .wbm_dat_o(wbm_dat_o), |
| // Slaves interfaces |
| .wbs_ack_i(wbs_ack_o), |
| .wbs_dat_i(wbs_dat_o), |
| .wbs_cyc_o(wbs_cyc_o), |
| .wbs_stb_o(wbs_stb_o), |
| .wbs_we_o(wbs_we_o), |
| .wbs_sel_o(wbs_sel_o), |
| .wbs_adr_o(wbs_adr_o), |
| .wbs_dat_o(wbs_dat_i) |
| ); |
| |
| // Instantiate four dummy slaves for testing |
| dummy_slave dummy_slaves [`NS-1:0]( |
| .wb_clk_i({`NS{wb_clk_i}}), |
| .wb_rst_i({`NS{wb_rst_i}}), |
| .wb_stb_i(wbs_stb_o), |
| .wb_cyc_i(wbs_cyc_o), |
| .wb_we_i(wbs_we_o), |
| .wb_sel_i(wbs_sel_o), |
| .wb_adr_i(wbs_adr_o), |
| .wb_dat_i(wbs_dat_i), |
| .wb_dat_o(wbs_dat_o), |
| .wb_ack_o(wbs_ack_o) |
| ); |
| |
| initial begin |
| wb_clk_i = 0; |
| wb_rst_i = 0; |
| wbm_cyc_i = 0; |
| wbm_stb_i = 0; |
| wbm_we_i = 0; |
| wbm_sel_i = 0; |
| wbm_adr_i = 0; |
| wbm_dat_i = 0; |
| end |
| |
| always #1 wb_clk_i = ~wb_clk_i; |
| |
| initial begin |
| $dumpfile("crossbar_wb_tb.vcd"); |
| $dumpvars(0, crossbar_wb_tb); |
| repeat (50) begin |
| repeat (1000) @(posedge wb_clk_i); |
| end |
| $display("%c[1;31m",27); |
| $display ("Monitor: Timeout, Test Crossbar Switch Failed"); |
| $display("%c[0m",27); |
| $finish; |
| end |
| |
| integer i; |
| |
| reg [`AW*`NS-1:0] addresses = { |
| {8'hB0, {24{1'b0}}}, |
| {8'hA0, {24{1'b0}}}, |
| {8'h90, {24{1'b0}}}, |
| {8'h80, {24{1'b0}}} |
| }; |
| |
| reg [`DW-1:0] m0_slave_data; |
| reg [`DW-1:0] m1_slave_data; |
| reg [`AW-1:0] slave_adr; |
| |
| initial begin |
| wb_rst_i = 1; |
| #2; |
| wb_rst_i = 0; |
| #2; |
| |
| // Case 1: Master0 addresses slave 0 and Master 2 Addresses slave 1 |
| slave_adr = addresses[`AW-1:0]; |
| m0_slave_data = $urandom_range(0, 2**(`DW-2)); |
| write(slave_adr, m0_slave_data, 0); |
| |
| #2; |
| read(slave_adr, 0); |
| if (wbm_dat_o[0*`DW+: `DW] !== m0_slave_data) begin |
| $display("Error reading from slave"); |
| $finish; |
| end |
| |
| #10; |
| slave_adr = addresses[`AW*2-1:`AW*1]; |
| m1_slave_data = $urandom_range(0, 2**(`DW-2)); |
| write(slave_adr, m1_slave_data, 1); |
| #2; |
| read(slave_adr, 1); |
| #10; |
| if (wbm_dat_o[1*`DW+: `DW] !== m1_slave_data) begin |
| $display("Error reading from slave"); |
| $finish; |
| end |
| #10; |
| // Case 2: Master0 addresses slave 0 and Master 2 Addresses slave 1 simultaenously |
| slave_adr = addresses[`AW-1:0]; |
| m0_slave_data = $urandom_range(0, 2**(`DW-2)); |
| |
| wbm_stb_i[0] = 1; |
| wbm_cyc_i[0] = 1; |
| wbm_we_i [0] = 1; |
| wbm_sel_i[0*SEL+: SEL] = {SEL{1'b1}}; |
| wbm_adr_i[0*`AW+: `AW] = slave_adr; |
| wbm_dat_i[0*`DW+: `DW] = m0_slave_data; |
| |
| slave_adr = addresses[`AW*2-1:`AW*1]; |
| m1_slave_data = $urandom_range(0, 2**(`DW-2)); |
| |
| wbm_stb_i[1] = 1; |
| wbm_cyc_i[1] = 1; |
| wbm_we_i[1] = 1; |
| wbm_sel_i[1*SEL+: SEL] = {SEL{1'b1}}; |
| wbm_adr_i[1*`AW+: `AW] = slave_adr; |
| wbm_dat_i[1*`DW+: `DW] = m1_slave_data; |
| |
| wait(wbm_ack_o[0] && wbm_ack_o[1]); |
| wait(!wbm_ack_o[0] && !wbm_ack_o[1]); |
| |
| // Read |
| wbm_we_i = 2'b00; |
| wait(wbm_ack_o[0] && wbm_ack_o[1]); |
| wait(!wbm_ack_o[0] && !wbm_ack_o[1]); |
| |
| if (wbm_dat_o[0*`DW+: `DW] !== m0_slave_data) begin |
| $display("Error reading from slave"); |
| $finish; |
| end |
| |
| // Case 3: Master0 addresses slave 0 and Master 2 Addresses slave 1 simultaenously |
| slave_adr = addresses[`AW-1:0]; |
| m0_slave_data = $urandom_range(0, 2**(`DW-2)); |
| |
| wbm_stb_i[0] = 1; |
| wbm_cyc_i[0] = 1; |
| wbm_we_i [0] = 1; |
| wbm_sel_i[0*SEL+: SEL] = {SEL{1'b1}}; |
| wbm_adr_i[0*`AW+: `AW] = slave_adr; |
| wbm_dat_i[0*`DW+: `DW] = m0_slave_data; |
| |
| slave_adr = addresses[`AW-1:0]; |
| m1_slave_data = $urandom_range(0, 2**(`DW-2)); |
| |
| wbm_stb_i[1] = 1; |
| wbm_cyc_i[1] = 1; |
| wbm_we_i [1] = 1; |
| wbm_sel_i[1*SEL+: SEL] = {SEL{1'b1}}; |
| wbm_adr_i[1*`AW+: `AW] = slave_adr; |
| wbm_dat_i[1*`DW+: `DW] = m1_slave_data; |
| |
| wait(wbm_ack_o[0] && !wbm_ack_o[1]); |
| wait(!wbm_ack_o[0] && !wbm_ack_o[1]); |
| |
| // Read |
| wbm_we_i = 2'b00; |
| wait(wbm_ack_o[0]); |
| wait(!wbm_ack_o[0]); |
| if (wbm_dat_o[0*`DW+: `DW] !== m0_slave_data) begin |
| $display("Error reading from slave"); |
| $finish; |
| end |
| |
| $finish; |
| end |
| |
| task read; |
| input addr; |
| input mindex; |
| begin |
| @(posedge wb_clk_i) begin |
| wbm_stb_i[mindex] = 1; |
| wbm_cyc_i[mindex] = 1; |
| wbm_we_i[mindex] = 0; |
| $display("Read cycle from master %0b started", mindex); |
| end |
| wait(wbm_ack_o[mindex]); |
| wait(!wbm_ack_o[mindex]); |
| wbm_stb_i[mindex] = 0; |
| wbm_cyc_i[mindex] = 0; |
| $display("Read cycle from master %0b ended.", mindex); |
| end |
| endtask |
| |
| task write; |
| input [`AW-1:0] adr; |
| input [`DW-1:0] data; |
| input integer mindex; |
| |
| begin |
| @(posedge wb_clk_i) begin |
| wbm_stb_i[mindex] = 1; |
| wbm_cyc_i[mindex] = 1; |
| wbm_we_i[mindex] = 1; |
| wbm_sel_i[mindex*SEL+: SEL] = {SEL{1'b1}}; |
| wbm_adr_i[mindex*`AW+: `AW] = adr; |
| wbm_dat_i[mindex*`DW+: `DW] = data; |
| $display("Write cycle from master %0b started", mindex); |
| end |
| |
| wait(wbm_ack_o[mindex]); |
| wait(!wbm_ack_o[mindex]); |
| wbm_stb_i[mindex] = 0; |
| wbm_cyc_i[mindex] = 0; |
| $display("Write cycle from master %0b ended.", mindex); |
| end |
| endtask |
| |
| endmodule |